Thursday, August 28, 2014

Barbara Askins (1939 - Present)

Barbara S. Askins is an American chemist. She is best known for her invention of a method to enhance underexposed photographic negatives. This development was used extensively by NASA and the medical industry, and it earned Askins the title of National Inventor of the Year in 1978. She was the first individual woman to earn this honor.

Barbara Askins (née Scott) was born in Belfast, Tennessee, in 1939. Originally a teacher, she returned to school to pursue a science career after having had a son and daughter. Askins earned Bachelor of Science and Master of Science degrees from the University of Alabama in Huntsville.

Askins is a physical chemist who worked for NASA's Marshall Space Flight Center and is best known for her pioneering invention of a process in which "images on developed photographic emulsions can be significantly intensified by making the image silver radioactive and exposing a second emulsion to this radiation." The resulting print, known as an autoradiograph, reproduces the image with significant increases in density and contrast. Her groundbreaking method enhanced underexposed emulsions and increased the limits of photographic detection. In short, it made visible the invisible in photos that would otherwise have been useless. This was very useful for a number of applications, including the coaxing of data from underexposed space images—such as those peering deep into space as well as those highlighting the geology of other bodies in our solar system.

Askins' invention also led to significant advances in the field of medical technology. In particular, Askins' method prompted improvements in the development of X-ray images. Medical images that were 96 percent underexposed suddenly become readable; this meant that doctors could dramatically decrease the amount of X-ray radiation they gave to patients when running routine or emergency tests. Askins' process was also later used in the restoration of old photographs. Askins patented her invention in 1978 (U.S. patent No. 4,101,780), and NASA employed it extensively for its research and development work.

Askins is a member of the American Chemical Society, the Sigma Xi honorary research Society, the American Association for the Advancement of Science, and the World Future Society.